165742143 has 16 divisors (see below), whose sum is σ = 253102080. Its totient is φ = 94506336.

The previous prime is 165742139. The next prime is 165742147. The reversal of 165742143 is 341247561.

165742143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165742139) and next prime (165742147).

It is not a de Polignac number, because 165742143 - 2² = 165742139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165742147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 18297.

It is an arithmetic number, because the mean of its divisors is an integer number (15818880).

Almost surely, 2^165742143 is an apocalyptic number.

165742143 is a deficient number, since it is larger than the sum of its proper divisors (87359937).

165742143 is a wasteful number, since it uses less digits than its factorization.

165742143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16966.

The product of its digits is 20160, while the sum is 33.

The square root of 165742143 is about 12874.0880453724. The cubic root of 165742143 is about 549.3017508317.

The spelling of 165742143 in words is "one hundred sixty-five million, seven hundred forty-two thousand, one hundred forty-three".